G9450 – History of injection drug use
HCPCS Level II code · G codes: Procedures / Professional Services (Temporary)
HCPCS codeG9450
- Long description
- History of injection drug use
- Short description
- Hx injec drug use
- Pricing indicator
00Not separately priced by Part B (bundled, not covered or Part A only)- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
Z2Undefined codes- Added
- January 1, 2015
- Last change
- January 1, 2022 – No change
- Termination date
- December 31, 2021
Frequently asked questions
What is HCPCS code G9450?
G9450 is a HCPCS Level II code for history of injection drug use. It was discontinued on December 31, 2021.
Does Medicare cover G9450?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby G codes
- G9438 – P2y inhibitor prescribed at discharge
- G9439 – P2y inhibitor not prescribed for documented reasons (e.g., allergy, medical intolerance, history of bleed)
- G9440 – P2y inhibitor not prescribed at discharge
- G9441 – Statin prescribed at discharge
- G9442 – Statin not prescribed for documented reasons (e.g., allergy, medical intolerance)
- G9443 – Statin not prescribed at discharge
- G9448 – Patients who were born in the years 1945 to 1965
- G9449 – History of receiving blood transfusions prior to 1992
- G9451 – Patient received one-time screening for hcv infection
- G9452 – Documentation of medical reason(s) for not receiving hcv antibody test due to limited life expectancy
- G9453 – Documentation of patient reason(s) for not receiving one-time screening for hcv infection (e.g., patient declined, other patient reasons)
- G9454 – One-time screening for hcv infection not received within 12-month reporting period and no documentation of prior screening for hcv infection, reason not given
- G9455 – Patient underwent abdominal imaging with ultrasound, contrast enhanced ct or contrast mri for hcc
- G9456 – Documentation of medical or patient reason(s) for not ordering or performing screening for hcc. medical reason: comorbid medical conditions with expected survival < 5 years, hepatic decompensation and not a candidate for liver transplantation, or other medical reasons; patient reasons: patient declined or other patient reasons (e.g., cost of tests, time related to accessing testing equipment)
- G9457 – Patient did not undergo abdominal imaging and did not have a documented reason for not undergoing abdominal imaging in the submission period
- G9458 – Patient documented as tobacco user and received tobacco cessation intervention (must include at least one of the following: advice given to quit smoking or tobacco use, counseling on the benefits of quitting smoking or tobacco use, assistance with or referral to external smoking or tobacco cessation support programs, or current enrollment in smoking or tobacco use cessation program) if identified as a tobacco user
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.